Process for the manufacture of shaped metal products



Aug.14, 1945. v c. cm; 2,382,384

PROCESS FOR THE MANUFACTURE OFSHAPED METAL PRdDUCTS Filed Feb/5, 1941Patented Aug. 14, 1945 PROCESS FOR THE MANUFACTURE OF SHAPEDMETALAPRODUCTS Camille om, Uccle-Brussels, Belgium; vested in th'eAlienProperty Custodian Application February 3, 1941, Serial No. 377,252 3InBelgium January 19, 1940. I

2 Claims. (01.29-188) It is known that shaped metal products, especiallyshaped metal products of small cross-section, may be produced by aprocess consisting in working a continuous band, which has been obtainedby causing a cylindrical piece to turn in front of a tool which onlyremoves a fraction of theradial, thickness of said piece.

In the case where the thickness, of a band obtained in theabove-mentioned manner could not be sufficiently increased in, order toform a relatively thick strip, it has also been proposed ,to

super-pose a plurality of such bands and weld them together by hotrolling in order to obtain strip metal. A

.The present inventionhas for its object a process which will permit theeasy production of a sectional ironof a relatively great thickness froma thin band which may be easily "and economically obtained by peelingfrom, the abovementioned metal piece.

"To thisend, according to theinvention, the band is foldedlongitudinally, the faces of the formed folds are broughttogether untilthey contact and-the mass so obtained is'rolled so as to form thedesired section.

1, According to a modification adapted to produce a section havinggreater strength, the body formed by bringing the faces of the foldsinto contact with each other, is rolled at the welding temperature ofthe metal so as to weld together the adjacent faces of the folds. Thiswelding of the faces of the folds may be performed, according to theinvention, during the period in which the section is formed or afterbringing together the faces of the folds.

Preferably, the cut out band is rolled before .being folded, in order tomake it more malleable.

This rolling is especially useful when the folding is carried out cold.

In one useful embodiment, the folding of the cut out band is efiected bypassing the latter sucperforming theprocessaccording tothe inven .tion.

F ures .1 and 2 illustrate this installation in elevation and inplanview respectively.

The same references have been used in both figures to denote identicaleleme'nts. A cylindrical piece 2 turns in the direction of the arrow Xin front of a tool 3 which may-be advanced in the direction of thearrow'Y. I By means of this tool, a thin strip or band tispeel'edffromthe body of the cylinder 2. *This"band;'in spiteo'f its small thickness,has a cross sectional areasubstantially equal to that "of the section ofthe shaped metal product it is desired to manufacture. This band is thenheated'in a'furn'ace 5 before it is rolled between rollersfi." f When itleaves these rollers, thebandis folded longitudinally. To this e nd"',itp sses; successively through pairs of shaping rollers which are 'pro-:vided with grooves of generally triang'ularform.

The successive pairs of shapingfrollersf a re designated I, 8, 9, l0 andI I. 'I'hefaces of thefgrooves in the different pails all l'iajlthesam'e Width,

but the angle which the'se factl slfilak j with each other varies "fromone pair of rollers to the next.

As can readily be seenfronranfinspection of l 'lgure 2; the triangulargrooves decrease in width as the-distance of the roller s to'fwhichtheybelong from the point at which the folding of the band :startsincreases. The depth of thegrooves obviously varies inverselyproportionally to their width as the two faces of the grooves of all theshaping rollers havethe same width.

Owing to this special method of folding the band, folds of a constantlength are obtained, and transverse drawing of the metal is avoided sothat there is no danger of its being torn during the folding, even whenthe folding is carried out cold.

It is to be noted that it is, however, useful to roll the band beforeits folding, in order to decrease the brittleness it might have assumedduring its cutting or unwinding.

After it has left the last pair of shaping rollers II, the band passesbetween two rollers l2, the axis of which is at right angles to the meanplane of the band. The distance between these two rollers is such thatthe faces of the folds are brought into contact with each other as theypass between these rollers.

After the faces of the folds have been brought together in this manner,the mass which is, so obtained is hot rolled between rolling cylindersl3 the profile ofwhich corresponds to that of the example, electricallyby the Joule effect between rollers l4 and the rolling cylinders H1. Therollers 14 are connected by means of contact members 15 to one of-theterminals l6 of a source of current, the other terminal I! of which isconnected by means of contact members l8 to the,

rolling cylinders I 3.

By having been passed hot through the rolling cylinders I3, the faces ofthe folds in ,contact' with each other are welded together and form ashaped product of the desired section having a great strength. In thismanner it is possible to obtain easily wires which can be drawn ifdesired after their exit from the rolling cylinders I3.

cylinders l3, a'wire is obtained whose core is a metal different fromthat which forms the rest of which a steel wire is placed during themanufacture, Such products may be utilized, among others, as highvoltage cables;

The process according to the present invention makes it possible toobtain in .an economical manner small shaped products of greatresistances similar to that of the shaped products which .are obtainedby successive rollings and Instead of welding the faces of the foldsduring the shaping operation of the compacted proached, then broughtinto contact with each so other and finally welded together. H

Moreover, by connecting the contact members on the roller 6, the band-isheated during its folding, what, in certain. cases, makes the lattermore easy. The latter arrangement forms strip iron immediately at theexit from the .rollers I2 and by connecting the contact members I8 withthe rollers I2, it becomes possible to eliminate the rollers 14 and therolling cylinders I3.

Thev process as described makes it also possible it) to produce shapedproducts constituted of different metals. To this end, a continuous wireof a different metal is placed longitudinally on the band 4. Thus, inthe illustrated installation, -at the end of the foldingoperation, whenthe band 4' issues from the shaping. rollers II, a wire 2!] unwoundfroma reel 2| is forced between the faces of one of the-formed folds.Forthis purpose, a roller 22, presses the wire 20 in one of the folds ofthe band 4. After shaping by the rolling reheatings. By cutting, e. g.,a band 84 millimeters wide and one tenth millimeter thick, a wire of3.28 millimeters in diameter can be easily manufactured.

If the desired section shaped product need not necessarily be of verygreat strength, the rolling ofcthe mass formed by bringing together thefolds of the band need not be effected at the welding temperature.

What I claim is:

q l. A process for the manufactured sectioned metal products consistingin cutting a continuous thin and wide band having a cross sectionapproximately equal .inarea to that of the desired product from acylindrical work piece, folding said band longitudinally into :numerousfolds, placing longitudinally against. the band a continuous wire of ametaldifferent from that of the band, bringing together the faces ofconsecutive folds until they contact, heating theresulting thicker andnarrower strip to -welding temperature, and rolling the strip So heatedto the desired section.

2. A process for the manufacture of sectioned metal products consistingin cutting a continuous thin and narrow band having a cross sectionapproximately equal in area to that of the desired product from acylindrical work piece, folding said band longitudinally into numerousfolds, placing longitudinally in one'of the formed folds a continuouswire of a metal diiferent from that of the band, bringing together the,faces of consecutive folds until they contact; heating the resultingthicker and narrower strip to the weldingtemperature, and rollingthestrip so heated to the desired section.

CAMILLO crro.

